de Haas–van Alphen Effect in Single Crystal MgB2
E. A. Yelland, J. R. Cooper, A. Carrington, N. E. Hussey, P. J. Meeson, S. Lee, A. Yamamoto, S. Tajima
DOI 10.1103/PhysRevLett.88.217002 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report observations of quantum oscillations in single crystals of the high temperature superconductor MgB2. Three de Haas–van Alphen frequencies are clearly resolved. Comparison with band structure calculations strongly suggests that two of these come from a single warped Fermi surface tube along the c direction, and that the third arises from cylindrical sections of an in-plane honeycomb network. The measured values of the effective mass range from (0.44–0.68)me. By comparing these to calculated band masses, we find that the electron-phonon coupling strength λ is a factor of ∼3 larger for the c-axis tube orbits than for the in-plane network orbit, in accord with recent microscopic calculations.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Damping of the de Haas–van Alphen oscillations in the superconducting state of MgB2
similarity 0.92J. D. Fletcher et al.
Source status unknown — claims are unverified
de Haas-van Alphen effect in single crystal MgB_2
similarity 0.91E. A. Yelland et al. · 2001 · arXiv:cond-mat/0112392
Source status unknown — claims are unverified
de Haas-van Alphen effect investigation of the electronic structure of Al substituted MgB_2
similarity 0.90A. Carrington et al. · 2005 · arXiv:cond-mat/0504664
Source status unknown — claims are unverified
de Haas–van Alphen effect investigation of the electronic structure of Al-substituted MgB2
similarity 0.90A. Carrington et al.
Source status unknown — claims are unverified
Damping of the de Haas-van Alphen oscillations in the superconducting state of MgB_2
similarity 0.90J. D. Fletcher et al. · 2004 · arXiv:cond-mat/0405120
Source status unknown — claims are unverified
Magnetic-field dependence of the gaps in a two-band superconductor: A point-contact study of MgB2 single crystals
similarity 0.89R. S. Gonnelli et al.
Source status unknown — claims are unverified